You have many things! ;)

Inside Moi Itself : Menu SUbD / Create / From File but better if the OBJ file is "Quadrangulated"
Or by scripts / Progs!
_importObj by Max Smirnov (keeps at the download the original form) but better if the OBJ file is "Quadrangulated"
http://moi3d.com/forum/index.php?webtag=MOI&msg=7841.6

Obj23dmWireframe by Michael Gibson : Only the wire Frame
http://moi3d.com/resources

Or directly by the SubDivision Free Modeler Rocket3F (<---> Moi3D )
https://www.rocket3f.com




SubDiv


_importObj




Rendered in the free SimLab Lite
https://www.simlab-soft.com/3d-products/simlab-composer-lite.aspx